slot_machine.rb

class SlotMachine
  VALUES = %w[x cherry seven bell star joker]

  def initialize(slots)
    @slots = slots
  end

  def play
    @slots = [
      VALUES[1..-1].sample,
      VALUES[1..-1].sample,
      VALUES[1..-1].sample
    ]
  end

  def score
    case @slots.uniq.count
    when 1
      element = @slots.first
      VALUES.index(element) * 10
    when 2
      return 0 unless @slots.include?("joker")

      element = @slots.sort[1]
      VALUES.index(element) * 5
    when 3
      0
    end
  end
end